DiamondBuzz
The right time to Increase De Beers stake: Botswana’s mines minister
Botswana’s mines minister Bogolo Kenewendo says it’s “absolutely” the right time to discuss the government increasing its 15 per cent stake in De Beers.
She indicated that Anglo American, which owns the other 85 per cent of De Beers, was moving closer to an initial public offering (IPO) and that Botswana was pushing for a larger stake.
Anglo announced last week that it was likely to write down the value of De Beers from its current $7.6bn, as a result of persistent weak diamond demand, especially in China.
Botswana’s diamond, which accounts for over 70 per cent of the country’s export earnings, has been severely hit by the global slump in demand.
In the last nine months of 2024 Debswana – its 50/50 joint venture with De Beers it sold $1.53bn of rough, down 52 per cent on the same period in 2023.
DiamondBuzz
CVD Synthetic Fashioned To Imitate A Rough Natural Diamond
The Near-Colorless Stone Is Believed To Be The First Time Creators Of A Synthetic Chemical Vapor Deposition (CVD) Diamond Have Shaped It To Resemble A Rough Diamond
The 6.87-carat near-colorless CVD diamond was shaped to resemble a natural rough octahedral crystal but showed distinct synthetic features under microscopic and spectroscopic analysis.GIA’s tests confirmed the stone’s synthetic origin, noting polishing marks, facet junction roughness, and luminescence patterns inconsistent with natural diamonds.
No evidence currently suggests widespread substitution of synthetics for rough natural diamonds, but existing detection tools could be adapted if such cases increase.
The near-colorless stone is believed to be the first time creators of a synthetic chemical vapor deposition (CVD) diamond have shaped it to resemble a rough diamond, according to an article in the spring issue of the institute’s Gems & Gemology quarterly journal.
Upon investigation with the use of raman spectroscopy, the results confirmed that the material was a diamond, with its near-octahedral shape similar to that of a natural rough crystal. Further analysis showed that it was not a true octahedron, as only one set of opposing faces was parallel. Microscopic observation under differential interference contrast revealed extremely flat faces marked mainly by parallel polishing lines, unlike the growth steps and trigons typically seen on natural octahedral faces. The facet junctions were extremely rough, possibly due to measures taken to improve the color, after which the main faces appear to have been repolished, the institute explained.
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CVD Synthetic Fashioned To Imitate A Rough Natural Diamond
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